Tube-cutter.



No. 825,949. PATENTBI) JULY 17, 1906. H. F. WEINLAND. TUBE CUTTER.

APPLICATION FILED JUNE 7, 1905 3 SHEETS-SHEET 1.

No. 825,949. PATENTBD JULY 17, 1906. H- F- WEINLAND.

, TUBE CUTTER.

IIIIIIIIIIIIIIIII mm, 1905.

.3 51 a2 3 z 15 0 C F 'Zg 7 f 2 61 No. 825,949. PATENTED JULY 17, 1906.

H. P. WBINLAND.

TUBE CUTTER.

APPLICATION FILED JUNE 7, 1905.

3 SHEETSSHEET 3,

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uozntoz wanna ms NORRIS PEYERS ca, WASHINGTON, 0.1:.

HENRY F. IVEINLAND, OF SPRIN LAGONDA A CORPORATION OF OHIO.

GFIELD, OHIO, ASSIGNOR TO THE MANUFACTURING COMPANY, OF

SPRINGFIELD, OHIO,

TUBE-CUTTER.

Specification of Letters Patent.

Patented July 17, 1906.

' Application filed une 7,1905. Serial No. 264,045.

T 1 7] whom it may concern.-

Be it known that I, HENRY F. I/VEINLAND, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Tube-Cutters, of which the following is a specification, reference be ing had therein to the accompanying drawings.

This invention relates to tube-cutters, and more particularly to that class designed to operate within the interior of the tube, being used for cutting off boiler-tubes, to the exterior of which access cannot readily be had when in position in the boiler, and also for cutting off other tubes.

The object of the invention is to provide a simple and efficient mechanism whereby the instrument may be readily rotated in one direction to move the cutters in a circular path around the interior of the tube to cut the same, while rotation of the actuating part in the opposite direction at proper intervals will serve to feed the cutters outward to increase the depth of their cut.

To these and other ends the invention 0011- sists in certain novel features, which I will now proceed to describe and will then particularly point out in the claims.

In the accompanying drawings, Figure 1 is an elevation, partly in section, showing a tube-cutter embodying my invention in one form, the same being inserted into working position in a boiler of a well-known type, the instrument being shown in elevation, with the exception of the or guide, which, together with the parts of the boiler illustrated, are shown in section. Fig. 2 is an enlarged elevation of the head of the implement and the parts immediately associated therewith. Fig. 3 is an elevation of the front end of the device. Fig. 4 is a central longitudinal section taken on the line ."0 cc of Fig. 3 and looking in the direction of the arrows. Fig. 5 is a transverse sectional view taken on the line 1 g of Fig. 4 and looking in the direction of the arrows. Fig. 6 is a transverse sectional view taken on the line .2 z of F ig. 4 and looking in the direction of the arrows. F 7 is a front end elevation of the wedge-block, Fig. 8 is a side elevation of the same. Fig. 9 is a detail view similar to Fig. 1. Fig. 10 is a detail sectional. view of the outer end of the operatingshaft. Fig. 11 is a view similar to Fig. 4, illustrating a modified form of my invention. Fig. 12 is a detail elevation of a part of the structure shown in Fig. 11 detached, and Fig. 13 is a similar view of another part of the same.

Referring to the said drawings, I will first describe more particularly the embodiment of my invention illustrated in Figs. 1 to 10, inclusive. In this construction 1 indicates a head adapted to enter loosely the tube to be operated upon and bearing the cutters which serve to sever said tube. This cutter-bearing head is cylindrical in its general form, being externally grooved longitudinally, as indicated at 2, to form seats or recesses to receive the cutter arms or levers 3, which are pivotally connected to said head. In the present instance I have shown the implement as organized to carry three cutters and a corresponding number of arms or levers, although it is obvious that the number of cutters and arms may be varied, as desired. Each arm 3 comprises a wider or body portion 4 at the front end of the head and a narrower or tail portion 5, forming a shank at the rear end of the head. The grooves or recesses 2 are correspondingly shaped, having a wider portion 6 and a narrower portion 7.

Each arm or lever 3 is pivoted to the head about midway of its narrower portion 5 by means of a transverse pivot-pin 8, passing through the arm and through webs 9, which form the side walls of the recess or seat at this point by reason of the formation in the head of recesses 10, which give access to the ends of the pivot-pins. Each pivot-pin is enlarged and threaded at one end, as indicated at 11, the aperture of the web being correspondingly threaded and the pin being provided with a notch or slot 12, so that it becomes, in effect, a pivot-screw. The other end of the pin 8 passes through an unthreaded aperture in the other web and projects be yond the same sufficiently to receive a transverse cotter 13, by means of which the pivotpin is prevented from working itself out by unscrewing. It will be seen that the pivots, while readily accessible, lie entirely within the outer cylindrical boundary of the head, so that they do not project in such a way as to become worn or injured. Each arm or lever 3 has that portion thereof which bears the cutter thrust normally inward by means of a suitable spring. To effect this result, I prefer to employ the construction shown, in which a spiral spring 14 is seated in a recess 15 in the head 1 near the rear end thereof, said spring bearing on the under side of that part of the arm 3 which lies back of the pivot 8, so as to force the rear end of said arm outward and the front or cutter-bearing end inward. Said arm is provided with a projection 16, which extends down into the coil of the spring and serves to aid in holding the same in proper position. At its front end each arm 3 has pivotally mounted therein a cuttingdisk 17, and to this end said arm is provided a short distance back of its front end with a transverse recess 18, in which thecuttingdisk is inserted in such a way as to have its blade or cutting portion proper project beyond the same, while its hub 19 lies wholly within the recess, between the front and back walls of which it fits. A pivot-screw 20 extends longitudinally of the arm across the recess, its outer end being threaded into a correspondingly-threaded opening at the outer end of the arm, while the remainder of its body portion is unthreaded and passes through the hub of the cutting-disk to form a bearing for the same extending beyond the same into an unthreaded aperture 21 on the other side of the recess 18, in which said end is supported.

The front end of the head 1 is recessed, as indicated at 22, and in this recess there fits and travels a wedge-block 23. The recess 22, in connection with the parts 6 of the grooves 2,which are cut entirely through into the recess 22, divides the forward half of the head 1 into three forwardly-projecting portions or arms 24, which form guide-arms for the wedgeblock. As will be seen from an examination of Fig. 6, these guide-arms are V-shaped in crosssection, their two inner surfaces meeting at an angle, and the wedge-block 23 is provided with correspondingly shaped grooves 25, which receive the angular portions of the guide-arms 24, and thereby serve to guide the wedge-block in its movements axially of the head and to prevent rotatory motion thereof. There being three cutterbearing arms employed in the construction illustrated, the wedge-block is provided with three corresponding inclined surfaces 26, one for each arm, and each arm is provided with an inwardly-extending projection or contactboss 27., held against the corresponding inclined surface 26 by the corresponding spring 14.

The outer end of the head 1 is provided with a ratchet 28, so connected thereto that the said head and ratchet rotate in unison.

In the construction shown the ratchet-teeth are formed upon the outer end of a sleeve 29, threaded into a recess 30 at the outer end of the head. The recess 30 has an unthreaded forward extension 31., in which is located a head or collar 32, formed on or otherwise permanently secured to the front end of the 0peratingshaft 33. The sleeve 29 when screwed into place in the head 1 holds the collar 32 firmly in place in the head, and while permitting it to rotate prevents longitudinal movement thereof relatively to the head.

34 indicates an actuating-sleeve mounted on the shaft 33, to whichit is connected by means of a spline 34 in such a way as to rotate in unison with said shaft, while free to move longitudinally thereof; The actuatingsleeve 34 is provided at the front end of its sleeve-like body with a ratchet 35, which is adapted to engage the ratchet 28 of the head. The teeth of these two ratchets rotate in unison in one direction, but are free to slip past each other in the opposite direction. The thread of the sleeve 29 is so directed that the rotation of the ratchet 28 by the ratchet 35 does not tend to unscrew the sleeve from the head 1.

The actuating-shaft 33 is a hollow shaft, and in it is mounted a rod 36, which is free to slide longitudinally within said shaft. This rod 36 is provided 37, which passes radially outward through slots 38 in the shaft 33 and engages the actuating-sleeve 34, so as to cause said rod and sleeve to move longitudinally in unison. A spring is employed to cause the actuatingsleeve 34 to move normally toward the head 1, so as to engage its ratchet withthe ratchet of the head. The arrangement of this spring in the construction now under consideration is such that it is located at the outer end of the rod 36. The shaft 33 is provided at its outer end with an operating-head 39, adapted to receive an operating bar, handle, or lever 40 or any. other suitable means by which said shaft may be readily rotated. In this head at the end of the rod 36 there is formed a recess or socket 41, which is, infact, an extension or terminal portion of the bore of the hollow shaft 33. In this socket or recess is located a spiral spring 42, one end of which bears against the base-wall 43 of the socket or recess as an abutment, while its other end bears against the outer end of the rod 36, act: ing thereon to hold the ratchets 35 and 28 in engagement, but yielding to permit them to pass when the shaft 33 is turned in the proper direction. Thus the shaft 33 may be turned in one direction without rotating the head 1. To permit said shaft to be turned in the other direction without rotating said head, the rod 36 is drawn outward, so as to disengage the two ratchets, and this may be effected by an operating-pin 44, secured to the upper end of the rod 36 and projecting radially outward therefrom through a slot 45 in the operatinghead 39. The slot 45-is L-shaped, as shown in Fig. 1, one portion thereof extending in the direction of the axis of the shaft and the at its front end with a pin other portion transversely thereto or circumferentially with respect to the shaft and head. The longitudinal portion of this slot permits the rod 36 to be moved so as to disengage the ratchets, whereupon said rod may be rotated so as to engage the pin 44 in the transverse portion of the slot 45,whereupon the ratchets will be held in their separated position, this device serving as a detent for holding them thus separated or disengaged.

The parts just described, which are free to rotate relatively to the head under certain conditions, rotating in unison with it under I other conditions, may be termed the actuating parts and comprise the actuating shaft and sleeve in the construction under consideration They serve not only to rotate the head to effect the cutting, but also to feed forward the wedge-block in order to move the cutters outward as the out deepens. To accomplish this latter result, I employ a feed-screw intermediate said wedge-block and actuating parts. In the construction under consideration said feed-screw is a nonrotating one (indicated by the reference-nu- .meral 46) secured to or formed in one piece with the wedgeblock 23 and extending outward therefrom through the recess 22 and through a suitable passage 47, extending centrally through the head 1. The threaded portion of this feed-screw extends into the front end of the hollow shaft 33, which is threaded to receive the same.

From a consideration of the structure just described it will be seen that when the ratchets 35 and 28 are disengaged and held in that position by the means provided for that purpose the shaft 33 may be turned to the right without rotating the head 1, thereby causing the feed-screw 46 and wedge-block 23 to move to the left in Fig. 4 and permit the cutterbearing arms to move inward under the in fluence of their springs 14 until the said arms are retracted or withdrawn into theposition shown in Figs. 2 and 3. Vith the parts in this position the head 1 may be readily introduced into the tube to be operated upon, whereupon the shaft 33 may be rotated in the opposite direction or to the left, either with the ratchets still held disengaged or with them in engagement, in which latter case they will slip past each other. In either case the head remains stationary and the wedgeblock 23 is moved forward, or to the right of Fig. 4, thereby forcing the cutter-bearing arms outward until the cutters are properly engaged with the tube. The shaft 33 is thereupon turned .in the original direction, or to the right, the ratchets being new in engagement, so that the head 1 turns in unison with the actuating-shaft, and the cutters are carried around in contact with the interior of the pipe to cut the same. I/Vhen' the cutters have cut to the full depth for which they are adjusted, a reversal of the direction of rotation. of the &

shaft 33 will again advance the \\'edge-blocl(, the head remaining stationary and the ratchets permitting this turning back of the shaft to advance the wedge-block and thrust the cutters farther outward. The shaft is then again turned in the original direction, and thse alternations in the direction ofrota tion of the shaft are continued until the cutting is completed. The ratchets are then again disengaged and the shaft is turned in the original direction,'or to the right, until the cutter-bearing arms have moved inward sufficiently to disengage the cutters and permit the withdrawal of the implement. It will be seen that the entire operation is an exceedingly simple one, depending entirely upon the direction of rotation of the actuating parts to accomplish both the cutting movement and the feeding of the cutters to the work.

In the construction just described, which is illustrated in Figs. 1 to 10, inclusive, of the drawings, the feed-screw is non-rotating and provision is made for a separate actuatingsleeve movable longitudinally of the actuat ing-shaft and having a separate provision whereby it may be so moved from the outer end of said shaft.

In Figs. 1], 12, and 13 I have shown a modified construction, in which the feedscrew rotates in unison with the actuatingshaft and in which the actuating-shaft and its ratchet-bearing sleeve are movable in unison longitudinally or axially with respect to the head. In this construction the head 1 and its cutter-bearing arms are identical in their general construction with the similar parts of the structure already described. The headratchet (indicated by the referencenumeral 48) is shown as formed directly upon the outer end of the head, while the wedgeblock (indicated at 49) .has a threaded aperture 50 extending longitudinally through its center. The actuating-shaft (indicated by the reference-1iumeral 51 and shown in the form of a tubular shaft) has formed on it or secured to it by any suitable connection, such as the threaded connection shown, a head 52, which carries a ratchet 53, cooperating with the ratchet 48 of the head 1. The head 52 is provided with a sleeve 54, which extends into a recess 55 in the outer or rear end of the head 1, in which recess it is free to rotate and to slide longitudinally to a limited extent. 56 represents the feed-screw, which is threaded to fit the threaded aperture 50 of the wedge-block 49. This feed-screw is provided with a head 57, which fits within a recess 58, formed within the sleeve 54 and head 52, said recess being slightly longer than the feed-screw head 57. The feed-screw is prevented from moving longitudinally relatively to the head 1, while free to turn in said head, this being accomplished by means of a pin 59, which passes through the head 1 transversely at one side of its central longitudinal Figs. 1 and 9.

&

axis, the feed-screw head 57 being provided with a circumferential groove 60, into which said pin extends, as shown in Fig. 11. The feed-screw 56 is caused to rotate in unison with the operating-shaft 51 and its head 52 by means of a pin 61, passing through the sleeve 54: and through a slot or elongated opening 62, extending transversely of the feed-screw head 57. This connection compels the feedscrew to rotate with the operating-shaft and its head, but permits said shaft and head to move longitudinally relatively to the main head and feed-screw, so as to permit the ratchets to be disengaged or to pass each other when rotated in the proper direction for that purpose. To hold the ratchets normally in engagement with each other, there is provided a spring 63, coiled in a recess or socket 6 1, formed axially in the feed-screw head 57. One end of this spring bears against the pin 61, while the other end bears against a screw-plug 65, which serves as an abutment for the spring and also as a closure for the recess or socket 64 to permit the in sertion and removal of the spring 63.

The operation of this modified form of cutter will be readily understood from the preceding description. Then the actuatingshaft 51 is rotated to the right, the ratchetsengage with each other in such a way that the cutterbearing head turns with the actuating-shaft to cause the cutters to sever the tube. When the actuating-shaft is turned in the other direction, or to the left, the ratchets slip by each other and the head remains stationary, the feed-screw rotating with the actuating-shaft and forcing forward the wedge-block, which is held from rotation in the manner already described in connection with Figs. 1 to 10. This forward movement of the wedge-block forces out the cutters in the manner already described. When it is desired to withdraw the cutters, the actuating-shaft and its head are pulled outward to disengage the ratchets, where upon the said shaft may be rotated to the right to move back the wedge-block and permit the cutter-bearing arms to retreat into the head.

, centered with relation to the tube being acted on, and it is also desirable to provide a gage to determine the location of the point at which the cutters operate upon the tube. I have provided a simple and effective device which accomplishes both of these functions at the same time and which may be readily changed to adapt it to Work on boilers of different kinds. This combined gage and centering-guide is shown more particularly in It comprises a disk 66, apertured, as shown at 67, to fit upon the actuating-shaft 33 or 51, along which it is free to slide. This disk is of a diameter such as to permit it to enter and fit the end of a boilertube 68, as shown in Fig. 9, and said disk is provided with a stop-flange 69, arranged to bear against the end of the tube and limit the motion of the disk into the tube. The actuating-shaft has mounted thereon an adjustable collar 70, which may be secured in position after adjustment by means of a setscrew 71. Where the boiler is so constructed that access can be had directly to the ends of the tubes, the disk 66 is placed upon the actuating-shaft and the collar 70 is secured on said shaft at a distance from the cutters corresponding with the distance from the end of the tube at which it is desired to make the cut.

When the implement is introduced into the tube, the disk is seated in the end of the tube, where it serves as a centering guide or bearing for the actuatingshaft, which latter is moved forward until the collar 70 comes 7 into contact with the disk, whereupon the cutters will be properly positioned within the tube to make the cut at the desired point.

When the implement is to be used upon a boiler provided with a header into which the tubes open at the rear, so that access cannot be had directly to them, the disk 66 is pro vided with an attachment in the form of a centering-ring 72, which is arranged to fit around the ledge or projection 73, formed around the hand-hole 7 1 on the outer face of the outer wall 75 of the header 76. This centering-ring 72 is secured to the arms 77, which are detachably connected by screwbolts 7 8 to the centering-disk 66. The centeri'ngring 72, fitting around the ledge 73, serves, through the arms 7 7 to hold the disk 66 properly centered with regard to the tube to be operated on, which is indicated in Fig. 1 by the reference-numeral 79. Of course it will be understood that the operating-shaft may be of any desired length to adapt it to different conditions, or a plurality of operating-shafts of different lengths may be provided for use in connection with a single opcrating-head. This latter mode of procedure may be readily carried out in connection with the form of construction shown in Figs. 11, 12, and 13, since the operating-shaft in that case may be constructed of ordinary gas-pipe, cut to any desired length, and threaded to engage it with the head 52. i

I do not wish to be understood as limiting myself strictly to the precise details of construction hereinbefore described, and shown in the accompanying drawings, as it is obvious that these details may be varied without departing from the principle of my invention. Moreover, although I have described the implement as a tube-cutter with reference more particularly to the cutting of boiler-tubes it is obvious that it may be used for cutting fines or any other tubular structure requiring to be cut from the inside. It will also be noted that while I have described the implement as provided with pivoted cutterbearing arms said parts need not necessarily be pivoted in order to permit their radial movement inward and outward, nor is it necessary that these radially-movable parts should be provided with cutters as the actual work ing instrumentalities, since it is obvious that the same mechanism for rotating the head and feeding the working instrumentalities in and out may be employed with working instrumentalities other than cutterssuch, for

instance, as expanding-rollers Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an implement of the character de scribed, a head having a ratchet, and parts radially movable relatively to said head and carrying the working tools or instrumentalities, in combination with a wedge-block movable longitudinally in the head and engaging said tool-bearing parts, a rotatable actuating part having a yielding ratchet cooperating with the ratchet of the head, a spring to engage said ratchets, and a feed-screw intermediate the wedge block and actuating part, said feed-screw acting to advance the wedge when the actuating part is turned in one direction, all of said parts rotating in unison when the actuating part is turned in the 0pposite direction, substantially as described.

2. In an implement of the character describe a head having a ratchet, and arms pivoted to said head to move radially relatively thereto and provided with the working tools or instrumentalities, in combination with a wedge-block movable longitudinally in the head and engaging said arms, a rotatable actuating part having a yielding ratchet cooperating with the ratchet of the head, a spring to engage said ratchets, and a feed-screw intermediate the wedge-block and actuating part, said feed-screw acting to advance the wedge when the actuating part is turned in one direction, all of said parts rotating in unison when the actuating part is turned in the opposite direction, substantially as described.

, 3. In an implement of the character described, a head having a ratchet, and parts radially movable relatively to said head, carrying the working tools or instrumentalities, and provided with springs which act to retract the tools into the head, in combination with a wedgeblock movable longitudinallyin the head and engaging said tool-bearing parts, a rotatable actuating part having a yielding ratchet cooperating with the ratchet of the head, a spring to engage said ratchets, and a feed-screw intermediate the wedge block and actuating part, said feed-screw acting to advance the wedge when the actuating part is turned in one direction, all of said parts rotating in unison when the actu- 1 ating part is turned in the opposite direction, substantially as described.

4. In an implement of the character described, a head having a ratchet, arms pivotally connected to the'head near one end to move radially relatively thereto and provided with the working tools or instrumentalities at their free ends, and springs acting to move said free ends inward, in combination with a wedge-block movable longitudinally in the head and engaging the free ends of said arms, a rotatable actuating part having a yielding ratchet cooperating with the ratchet of the head, a spring to engage said ratchets, and a feed-screw intermediate the wedge-block and actuating part, said feedscrew? acting to advance the wedge when the actuating part is turned in one direction, all of said parts rotating in unison when the actuating part is turned in the opposite direction, substantially as described.

In an implement of the character describe a head having a ratchet, and parts radially movable relatively to said head and carrying the working tools or instrumentalities, in combination with a wedge-block movable longitudinally in the head and engaging said tool-bearing parts, a rotatable actuating part having a yielding ratchet cooperating with the ratchet of the head, a spring to engage said ratchets, a feed-screw intermediate the wedge-block and actuating part, said feed-screw acting to advance the wedge when the actuating part is turned in one direction, and all of said parts rotating in unison when the actuating part is turned in the opposite direction and the ratchets are eagaged, and means for ratchets to permit the actuating part to be turned in the last-mentioned direction independently of the head, whereby said feedscrew may be caused to act to retract the wedge-block, substantially as described.

6. In an implement of the character -described, a head having a ratchet, and parts radially movable relatively to said head and carrying the working tools or instrumentalities, in combination with a wedge-block movable longitudinally in the head and engaging said tool-bearing parts, a rotatable actuating part having a yielding ratchet cooperating with the ratchet of the head, a spring to engage said ratchets, a feed-screw intermediate the wedge-block and actuating part, said feed-screw acting to advance the wedge when the actuating part is turned in one direction, and all of said parts rotating in unison when the actuating part is turned in the opposite direction and the ratchets are engaged, and means for disengaging said ratchets to permit the actuating part to be turned in the last-mentioned direction independently of the head, whereby said feedscrew may be caused to act to retract the wed e-blocksaid means com risin adetent O J D disengaging said ating-shaft being gaging said tool-bearing parts,

' able longitudinally in said wedge-block to move in unison therewith, and an actuating-shaft rotatable relatively to the head and fixed against longitudinal movement relatively thereto, said actuprovided with a yielding spring-controlled sleeve rotating in unison therewith and having a ratchet to cooperate with the ratchet of the head, said shaft having a threaded portion to receive the feedscrew, substantially as described.

8. In an implement of the character de scribed, a head having a ratchet, and parts radially movable relatively to said head and carrying the working tools or instrumentali ties, in combination with a wedge-block movable longitudinally in the head and en means for preventing rotation of said wedge-block relatively to the head, a feed-screw connected to said wedge-block to move in unison therewith, and an actuating-shaft rotatable relatively to the head and fixed against longitudinal movement relatively thereto, said actuating-shaft being provided with a yielding spring-controlled sleeve rotating in unison therewith and having a ratchet to cooperate with the ratchet of the head, said shaft having a threaded portion to receive the feedscrew, said shaft being hollow and slotted and provided with a rod mounted therein, said rod having a projection extending through the slotted engage and move the sleeve, and with anopcrating portion extending outward beyond the shaft at its operating end, substantially as described.

9. In an implement of the character described, a head having a ratchet, and parts radially movable relatively to said head and carrying the working tools or instrumentalities, in combination with awedge-block movthe head and engaging said tool-bearing parts, means for preventing rotation of said wedge-block relatively to the head, a feed-screw connected to said wedge block to move in unison therewith, and an actuating-shaft rotatable relatively to the head and fixed against longitudinal movement relatively thereto, said actuating-shaft being provided with a yielding spring-controlled sleeve rotating in unison therewith and having a ratchet to cooperate with the ratchet of the head, said shaft having a threaded portion to receive the feed-screw, said shaft being portion of the shaft to.

hollow and slotted and provided with a rod mounted therein, said rod having a projection extending through the slotted portion of the shaft to engage and move the sleeve, and with an operating portion extending outward beyond the shaft at its operating end, said operating portion consisting of a radiallyprojecting pin, and the inclosing part being provided with an L-shaped slot through which said pin projects, substantially as described.

10. In an implement of the character described, the combination, with a head recessed and radially slotted at one end to form uiding-arms, of a wedge-blockmovable longitudinally of the head and grooved to fit said guidingarms, means wedge-block in either direction, and tool-bearing arms pivoted to the head, fitted in said slots and bearing upon the wedge-block, substantially as described.

11. In an implement of the character described, a head provided with longitudinal external recesses, and a central recess at its forward end, with which said longitudinal recesses communicate, forming radial slots separated by guide-arms, a wedge-block mounted in said central recess and grooved to fit between said guide-arms, means for moving -said wedge-block longitudinally of the head,

and tool-bearing arms fitting said longitudinal recesses, pivoted therein near their rear ends, and bearing on the wedge-block at their front ends, substantially as described.

12. In an implement of the character described, a head provided with longitudinal external recesses, and a central recess at its forward end, with which said longitudinal recesses communicate, forming radial slots separated by guide-arms, a wedge-block mounted in said central recess and grooved to fit between said guide-arms, means for moving said wedge-block longitudinally of the head, and tool-bearing arms fitting said longitudinal recesses, pivoted therein near their rear ends, and bearing on the wedge-block at their front ends, which are provided with working tools, said arms extending beyond said pivots at their other ends, and springs being interposed between said extended portions of the arms and the head, substantially as described.

13. In an implement of the character described, the combination, with a head, of cutter-bearing arms pivotally connected there-' for moving said a 1 L In an implement of the character de scribed, a substantially cylindric hub having longitudinal recesses or seats for the toolbearing arms, and other external recesses intermediate said longitudinal recesses, whereby parallel pairs of Webs are formed to receive the pivotpins, said webs having transverse apertures, one of which is enlarged and threaded, tool-bearing arms fitting the longi tudinal recesses and apertured to receive the pivot-pins, and pivot-pins passing through the apertures of the webs and arms, enlarged and threaded at one end to engage the threaded apertures of the webs, and projecting at their other ends beyond the companion webs, said projecting ends being provided with cotters, substantiall as described.

15. In an implement of the character described, a tool-bearing head recessed at one end to receive a wedge-block, provided with a central aperture for the wedge-block feedscrew, and having at its other end a recess, the outer portion of which is threaded, a wedge-block fitting the first-mentioned recess and provided with a feed-screw extending through the central aperture into the lastmentioned recess, a hollow operatingshaft internally threaded to receive the feedscrew and provided with a head fitting the inner unthreaded part of the last-mentioned recess, a sleeve fitting the threaded portion of said recess, bearing against the head or collar of the operating-shaft to prevent longitudinal motion thereof relatively to the head, and having on its outer end a ratchet, and a spring-actuated sleeve mounted on the actuating-shaft to rotate in unison therewith and move longitudinally thereof, said sleeve being provided with a ratchet engaging the first-mentioned ratchet, substantially as described.

16. In an implement of the character described, the combination, with a head adapted to enter the tube to be operated on, and an actuating-shaft provided with. a collar longitudinally adjustable thereon, of a combined gage and centering-guide comprising a disk fitted to slide on the actuating-shaft, the body of said disk being adapted to fit within the end of a boiler-tube and being provided with a stop-flange to engage the end ofsaid tube, a centering-ring adapted to fit around the marginal edge of a hand-hole, and longitudinally-extending arms detachably connecting said centering-ring and disk, substantially as described.

In testimony whereof I a'l'lix my. signature in presence of two witnesses.

HENRY F. \VEINLAND.

WVitnesses:

E. O. I'IAGAN, IRVINE MILLER. 

